Furnace for destroying waste



June 17, 1930. s. H. THOMPSON FURNACE FOR 'DESVTROYING WASTE Filed Sept. 27', 1926 V 2' Sheets-Sheet June 17, 1930.

s. H. THOMPSON FURNACE FOR DESTROYING WASTE Filed Sept. 27, 192? Z Sh ee t S-She et 2 Patented June 17,1930

1 UNITED STATES SAMUEL/II. THOMPSON, on NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, ro MORSE BOULGER DESTRUCTOR COMPANY, A' conroRATIoN or DELAWARE *PATENT OFFICE FURNACE FOR DESTBOYING WASTE Application filed September 2?, 1926. Serial No. 137,874.

This application relates to improvements in furnaces for destroying waste, and has for an object to provide a compact'structure of this character in which ample travel and 3*space'is' provided for. the combustion of the These an'dother objects will be more fully described and set forth in the following specification and shown in the accompanying drawings in which 1is a vertical section through a furnace embodying my invention openings 10*, 1O and'10 'being shown in dotted lines to indicate their relative position in the opposite side wall. Fig. 2 is a vertical transverse section therethroughalong the line 2 2 of Fig. 1.

"Fig. 3 is a horizontal section through such furnace along the line 3-3 of Fig. 1, the

heating coils beingremoved for the purpose of clearness. I

Like numerals refer to like elements throughout the drawing in which 10 indicates generally a furnace having an interior lining 10 of'suitable'refractory material surrounded by enclosing'brick-work 10, which is, in the main, spaced from the refractory lining to provide air spaces 11 which serve to insulate the exterior casing and to accommodate expansion and contraction of therefractories. At the top the furnace may be covered with suitable protecting and insulating material 12 such as sil-o-cel, as shown in Figs. land? for example.

Closing one end of the combustion chamber 10 is the partition wall 10. An arched hearth 16 extends upwardly and outwardly from the abutment .10 to the wall 10, being spaced from the base or bottom 10 of the furnace to form a chamber 10 The wall l is interrupted at the bottom to let in a horizontally arranged arch 17, which extends between and is seated in the side walls 10 (see Fig.3, for example). ."This arch 17 serves to buttress the-upper and outer'end of the arch 16, the end tile of which are extended to contact with thecurve'dcontour of the arch 17 as indicated in dotted lines in Fig. The arch 17 is supported against vertical :drop by the transverse supporting wall 19, which is provided with'the aperture 19 therein extending between the chamber 10 and thecombustion and settling chamber 10, which is formed by the end wall 10 of the furnace and thepartition and support mg walls 10 and 19, together with the top and'bottom ofthe furnace. This'construction provides suitable refractory support and staying means for the arch 16 without the use of metal members. I

The arch 16 terminates at, its side short of the sidewalls 10 and 10 toprovide passages 16*, 16 =from the primary'combustion chamber 10 to the chamber 10 A charging open.- ing 20 isprovided in the top wall 10*. While this opening is shown as eccentric with respect to the axis of the furnace; it is obvious that it"may be centrally or otherwise located if desired. Communicating with the chamber 10 in alignment withthegrate 14 is the. side port'l0 ,-as shown in Fig. 3 for example. This port is openor closed through themedium of a sliding counter-balanced door21 of any suitable construction.

A side opening 1O is located in the side wall of the furnace in alignment with the hearth 16 as indicated in Fig.3, andthis is suitably controlled by a hinged door 22. Communicating with the chamber 10 are the ports 1O (see Figs. 1 and 3) also suitably controlled by doors 23in well known manner.

From the cliamber IOleads an outlet passage 10 ,at the upper portion, the same communicating with the stack 25, the flow being controlled thereto by means of the sliding damper or gate 26.

, Wat-erpipes 10, as illustrated in Fig. .1. r

In the operationbf my furnace combustible rubbish or waste is deposited upon the 27 are located in the chamber grate 14 through the charging openings 10, 10 or through opening 10 if so desired, and Wet waste, or other reluctantly combustible Waste is deposited upon the hearth 16 through charging opening 20. During combustion of the waste on grate 1 1 the gases thereof will travel over and act upon the waste upon hearth 16, the inclination of which not only assists in the automatic spreading thereof, but also tends to present the same in an inclined mass for more efficient action of the passing gases. These gases, together with those generated from the wet Waste are compelled to travel laterally over the hearth 16,

downwardly through passages 16, 16 into the chamber 10 in which further expansion and combustion may occur, and the heat of the gases passing therethrough will be transmitted in a measure at least to the under side of hearth 16, increasing the heat thereof and enhancing the destruction and distillation of the superimposed wet waste. The gases flow from the chamber 10 through the passage 19 into thefinal combustion and settling chamber 10 in which room for further expansion is provided, permitting a thorough combustion of the gases and deposit of any carried solids in the chamber. ,7

Exhaust of the gasesand consequent draft is controllable by operation of the damper 26, as will be obvious.

Removal of the accumulated clinker, ash and other deposits is rendered. easy by the ports disclosed.

The structure illustrated provides a compact furnace by locating the chamber 10 beneath the hearth 16, where an added heating effect upon such hearthis obtained as well as providing suitable travel and combustion space for the gases. This construction also obtains a desirable travel of the gases from the rubbish upon the grate 14: relative to the waste upon hearth 16 as described above.

The method of sustaining and buttressing the arched hearth 16 is also advantageous and meritorious.

It will be apparent that my invention is susceptible of modification and departure from the form illustrated and described, and I do not care to be restricted to such form except as defined in the appended claims.

What I claim is:

l. A furnace of the class described provided with a combustion chamber, a hearth located therein, said hearth comprising an arch supported at one end and curving upwardly and outwardly therefrom, a horizontally arranged arch stayed at its ends and contacting the upper end of said arched hearth to buttress the same against disassembly.

2. A furnace provided with a combustion chamber, a hearth located therein, said hearth being arched, supported at one end and extending upwardly and outwardly therefrom, a transverse supporting wall, a

tressing arch.

4. A furnace provided with a combustion chamber, a hearth located therein, said hearth being arched, supported at one end and extending upwardly and outwardly. therefrom, a transverse supporting wall, a horizontally arranged arch supported upon said wall, said last named arch being stayed at its ends and contacting and buttressing the upper end of said arch-ed hearth, and a partition extending upwardly from said buttressing arch, said furnace being constructed with a chamber beneath said hearth, said supporting wall being apertured for exhaust of gases from said last named chamber.

5. A furnace provided with a combustion chamber, a hearth located therein, said hearth being arched, supported at one end and extending upwardly and outwardly therefrom, a transverse supporting wall, a horizontally arranged arch supported upon said wall, said last named arch being stayed at its ends and contacting and buttressing the upper end of said arched hearth, and a partition extending upwardly from said buttressing arch, said furnace being further provided with a chamber beneath said hearth and a combustion and settling chamber, the latter being separated from said primary combustion chamber and said chamber beneath said arch by said supporting wall and partition wall, said supporting wallbeing apertured to afford communication between said chamber beneath said hearth and said combustion and settling chamber. 6. A furnace having a grate, a partition Wall spaced from said grate, a hearth extending from adjacent said grate to said wall, said hearth terminating at its sides a distance from the adjacent walls of said furnace to provide passages, said furnace being provided with a primary combustion chamber overlying said hearth and grate, a second chamber beneath said hearth, and means to permit escape of gases from said second chamber out of said furnace.

7. A furnace having a grate therein, a partition wall spaced from said grate, an imperforate hearth extending from adjacent said grate to said wall, said furnace being provided with a primary combustion chamber overlying said grate and hearth, a second I chamber beneath said hearth and a third chamber located on the side of said wall op- 1 posite said hearth said furnace being further provided with a passage at a side of said hearth leading to said second chamber and a passage leading from said second chamber to Said third chamber, said third chamber being substantially larger in cross section than the passage therein to reduce gas velocity to per- I mit particles carried in suspension to settle out,

In testimony whereof I have signed my name to this specification.

' SAMUEL H. THOMPSON. 

